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Part Number

Part Number:
NSN:
NIIN:
Item Name:
SCREW , MACHINE

Definition:

AN EXTERNALLY THREADED FASTENER WHOSE THREADED PORTION IS OF ONE NOMINAL DIAMETER, NO 0 (0.060 IN./1.5 MM) OR LARGER, DESIGNED TO BE HELD OR DRIVEN WITH EITHER A WRENCH OR AN INSERTED DRIVER OR BOTH (EXCLUDING INTERNAL SOCKET OR INTERNAL MULTIPLE SPLINE TYPES), IN SIZES BELOW NO. 10 (0.190 IN./5 MM). NO. 10 AND LARGER SIZES MUST HAVE A HEAD DESIGNED FOR ANY TYPE INSERTED DRIVER (EXCLUDING INTERNAL SOCKET OR INTERNAL MULTIPLE SPLINE TYPES), BUT MAY ALSO BE DESIGNED FOR EXTERNAL WRENCHING. A LOCKING FEATURE MAY BE INCORPORATED IN THE DESIGN OF THE HEAD OR THREADS. EXCLUDES BOLT, CLEVIS; BOLT, EXTERNALLY RELIEVED BODY; SCREW, EXTERNALLY RELIEVED BODY; AND SCREW, ASSEMBLED WASHER. SEE ALSO, SCREW, INSTRUMENT; BOLT, MACHINE; BOLT, INTERNAL WRENCHING; AND SCREW, CAP SOCKET HEAD.

CAGE Information

Code Company
58251 FIRST AMERICAN SALES CO INC

Federal Supply Class

Title

SCREWS

Inclusions:

Exclusions:

Characteristics (Decoded)

MRC Requirements Statement Clear Text Reply
AHYM NOMINAL THREAD DIAMETER 0.190 INCHES
CQFM HARDNESS RATING 36.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM
AASU HEAD HEIGHT 0.105 INCHES MINIMUM AND 0.120 INCHES MAXIMUM
CYAU SCREW MATERIAL STEEL COMP E4340 OR STEEL COMP 8740
THSD THREAD SERIES DESIGNATOR UNJF
CYBG HEAD HOLE CONFIGURATION STYLE HEXAGON FLATS
CQBC MINIMUM TENSILE STRENGTH 160000 POUNDS PER SQUARE INCH
AAJD THREAD CLASS 3A
AATB WIDTH BETWEEN FLATS 0.305 INCHES MINIMUM AND 0.314 INCHES MAXIMUM
ABQZ INTERNAL DRIVE STYLE CROSS RECESS TYPE 1
AAJF THREAD DIRECTION RIGHT-HAND
ASXK HOLE QUANTITY 3
AAUB HOLE DIAMETER 0.046 INCHES MINIMUM AND 0.056 INCHES MAXIMUM
AASB FASTENER LENGTH 0.984 INCHES MINIMUM AND 1.031 INCHES MAXIMUM
AASA THREAD LENGTH 0.922 INCHES MINIMUM AND 1.031 INCHES MAXIMUM
CYAW SCREW MATERIAL DOCUMENT AND CLASSIFICATION MIL-S-5000 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-6049 MIL SPEC 2ND MATERIAL RESPONSE OR AMS 6322 ASSN STD 2ND MATERIAL RESPONSE
CYBA SCREW SURFACE TREATMENT ALUMINUM AND CHROMATE
AASK HEAD STYLE HEXAGON
CYBE SCREW SURFACE TREATMENT DOCUMENT AND CLASSIFICATION MIL-C-83488 TY 2 CLASS 3 MIL SPEC SINGLE TREATMENT RESPONSE
CMLP THREAD QUANTITY PER INCH 32

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